ACS SASSI Documentation

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

====== BBCGEN Command ======

BBCGEN,<panel>,<ShearModel>,[fc],[fy],[Pn],[Nu],[bre],[bys]

Auto-generate a backbone curve for a panel using the Ultimate Shear value for the panel generated by the [[com:SHEAR]]. This command will always generate a 22 point BBC the first point cracking point of the curve(.025418%,3.5*sqrt(fc)*panel area). The next 20 points will equidistant spaced along the percentage axis until the yield point is reached. The final point all BBCs will be at (2%,1.02*Ultimate Shear). All of the Shear model variables specified by the user are optional. If the user leaves a shear model argument blank the command will use 0 for that variable.   

  * panel - panel number. If panel = 0 BBCs will be generated for all panels defined by the user.
  * ShearModel - Numeric code for which shear model will be used to generate the backbone curve. The shear model equations can be found in the description of the [[com:SHEAR]] command. The upper or lower bound will be used for the BBC if the calculated shear for ACI 318-08 or Wood 1990 fall outside the bounds specified in the model equations.    
    * 1 - ACI 318-08
    * 2 - Wood 1990
    * 3 - Barda 1972
    * 4 - UB Empirical  
  * fc - compressive strength (ksi or kN/m<sup>2</sup>)
  * fy - reinforcement yield strength (ksi or kN/m<sup>2</sup>)  
  * Pn - web reinforcement ratio 
  * Nu - axial force (kips or kN)
  * bre - boundary element reinforcement area (ft<sup>2</sup> or m<sup>2</sup>)
  * bys - boundary element reinforcement yield strength (ksi or kN/m<sup>2</sup>)

ACS SASSI Documentation

User Tools

Site Tools

Page Tools